How to hide the field before submitting and updating after successful saving

How to hide the field before submitting and updating after successful saving

Hi All,

I am trying to develop ticket management application for practise.

I have added below fields in form. Status List should not be visible while submitting the form. Once form is submitted Status list should be visible with assigned value.

1. Subject
2. Decription
2.Product
4. Priority
5. File
6.Staus -- 1. UnAssigned 2. Assigned 3. Completed.

After submitting the form Status should be UnAssigned. 


Regards,
Nagendra.